Deuteronomy 21:22

And if a man have committed a sin worthy of death, and he be to be put to death, and thou hang him on a tree:

If a man have committed a sin ... and thou hang him on a tree. Hanging was not a Hebrew form of execution-gibbeting is meant; but the body was not to be left to rot, or be a prey to ravenous birds; it was to be buried "that day," either because the stench of a hot climate would corrupt the air, or the spectacle of an exposed corpse bring ceremonial defilement on the land.